Home / 521,831,653.87-720,128,145.66-286,886,311.69

Finding the Fourth Proportional to 521,831,653.87, 720,128,145.66 and 286,886,311.69

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Solution

The fourth proportional to 521,831,653.87, 720,128,145.66 and 286,886,311.69 is: 395,903,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,831,653.87 : 720,128,145.66 = 286,886,311.69 : x
  2. Step 2: Convert to fraction form
    521,831,653.87/720,128,145.66 = 286,886,311.69/x
  3. Step 3: Cross multiply
    521,831,653.87x = 720,128,145.66 × 286,886,311.69
  4. Step 4: Simplify right side
    521,831,653.87x = 206,594,907,652,556,480
  5. Step 5: Solve for x
    x = 206,594,907,652,556,480/521,831,653.87
  6. Step 6: Final answer
    x = 395,903,364.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.